The Dev Tools --> Application --> Interest Group pane doesn't show fields like:

• priority
• priorityVector
• prioritySignalsOverrides
• enableBiddingSignalPrioritiztion

The code that created the IG looks like this:
var interestGroup = { owner: 'https://www.pst-dsp.com', name:InterestGroupabc, priorityVector: { signalA: 1 }, prioritySignalsOverrides: { signalA: 1 }, enableBiddingSignalsPrioritization: 1, priority: 10, lifetimeMs: 1000 * 60 * 60 * 24 * 30, ads: [], biddingLogicUrl: 'https://www.pst-dsp.com/bidding.js' }; await navigator.joinAdInterestGroup(interestGroup);

Here is the Dev Tools values displayed, w/o priority fields:

And here we see the expected db values, indicating it was correctly joined.

Also demo here.

This is minor, would be good as part of general introspection, debugging, etc.